Grade 23

Datasheet
ASTM Grade (UNS No.) GRADE 23 (R56407)
Chemical Composition (Max. values unless range is shown) (wt. %) 0.08C; 0.03N; 0.13O; 0.25Fe; 5.5-6.5Al; 3.5-4.5V; 0.0125H
TENSILE PROPERTIES Guar.R.T. Min*. Guar.R.T. Min**. Typical Elevated Temperature Properties
93˚C (200˚F) 149°C(300°F) 204°C(400°F) 260°C(500°F)
Ultimate Strength MPa (ksi) 862 (125) 827 (120) 833 (121) 770 (112) 723 (105) 678 (98)
Yield Strength, 0.2% offset MPa (ksi) 793 (115) 759 (110) 712 (103) 640 (93) 587 (85) 532 (77)
Elongation in 51 mm (2″) gage length (%) 10 [7.5(6.0)]**** 13 15 16 16
Reduction in Area – Bar, Billet & Forging only (%) 25 15
OTHER MECHANICAL PROPERTIES * Extra low interstitials
** Per ASTM F136 specification
*** Per ASTM “B” product specifications
**** Transformed-beta condition
Stress to Rupture in Time Shown Stress MPa (ksi)
Time-Hrs. at Temp. (˚C)
Stress &Time to Produce Elongation Shown (creep) Stress MPa (ksi)
Time-Hrs. at Temp. (˚C)
Creep (%)
Charpy V-Notch Impact @ R.T. Joules (ft-lbs) 24- 40 (18 – 30)
Bend Radius Under 1.78 mm (0.070″) thick 4.5 x Thickness
1.78 mm (0.070″) and over 5.0 x Thickness
Welded Bend Radius 6 – 10 x Thickness
Nominal Hardness 32 HRC
PHYSICAL PROPERTIES
Nominal Beta Transus °C (°F) 982 (1800)
Coefficient of Thermal Expansion 10-6/˚C (10-6/˚F) 0-100˚C (32 -212˚F) 9.2 (5.1)
0-315˚C (32-600˚F) 9.5 (5.3)
0-538˚C (32-1000˚F) 10.1 (5.6)
0-648˚C (32-1200˚F) 10.4 (5.8)
0-816˚C (32-1500˚F) 10.8 (6.0)
Density g/cm3 (lbs/in3) 4.43 (0.160)
Melting Point, Approx. °C (°F) 1650 (3000)
Electrical Resistivity @ R.T. 10-6 ohm•cm (10-6 ohm•in) 165 (65)
Modulus of Elasticity – Tension GPa (103 ksi) 114 (16.5)
Modulus of Elasticity – Torsion GPa (103 ksi) 42.8 (6.2)
Thermal Conductivity W/m•˚C (BTU/hr•ft•˚F) 7.3 (4.2)
Specific Heat J/Kg•˚C (BTU/lb•˚F) 565 (0.135)
Weldability Very Good
Industry Specifications ASTM – B265, B348, B363, B381, B861, B862 and F136; AMS – 4907, 4930 and 4956